commensalism
Barnacles on a crab's shell improve its toughness, while the barnacles (normally lacking motility) are able to visit more than one location to obtain food, and may even feed on the crab's prey. Some barnacles, however, can cause damage or sterility in some species of crabs.
There is only one main difference between hermit crabs and barnacles. Hermit crabs have a hard exoskeleton that protects their bodies.
A sacculina is a genus of barnacles, which is a castrator of crabs.
Both crabs and barnacles have claws and also both shed their external skeleton, the limpets do not.
Five examples of crustaceans: crabs, lobsters, barnacles, shrimps, and krill Barnacles are not a crustacean.
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Blue crabs usually eat clams, oysters, and mussels though they prefer freshly dead or freshly caught food. They do not eat barnacles but they are often found on the crab.
Crabs, hermit crabs, ghost shrimp, shrimp, barnacles, lobsters, isopods, amphipods.
Crabs do eat other crustaceans like barnacles, krill, shrimp and crayfish.
barnacles mussels crabs periwinkles
barnacles, sea stars, clams, and crabs